syzkaller login: [ 31.620613] BUG: Bad rss-counter state mm:00000000a3218c4e type:MM_FILEPAGES val:33 [ 31.621916] BUG: Bad rss-counter state mm:00000000a3218c4e type:MM_ANONPAGES val:22 [ 31.771954] ================================================================== [ 31.772617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.773304] Read of size 8 at addr ffff88800efff968 by task sshd/219 [ 31.773896] [ 31.774057] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.774684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.775407] Call Trace: [ 31.775642] [ 31.775845] dump_stack_lvl+0x91/0xf0 [ 31.776307] print_report+0xcc/0x620 [ 31.776661] ? __virt_addr_valid+0x102/0x340 [ 31.777065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.777517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.777985] kasan_report+0xbe/0xf0 [ 31.778361] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778811] vma_interval_tree_remove+0xc75/0xec0 [ 31.779251] vma_prepare+0xc54/0x11a0 [ 31.779602] __split_vma+0x5af/0x950 [ 31.779955] ? __pfx___split_vma+0x10/0x10 [ 31.780346] ? find_held_lock+0x2c/0x110 [ 31.780729] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.781154] ? lock_is_held_type+0x9f/0x120 [ 31.781547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.782009] ? mtree_range_walk+0x632/0x900 [ 31.782416] ? mas_walk+0x5c7/0x7c0 [ 31.782769] do_vmi_munmap+0x1f1/0x2b0 [ 31.783125] mmap_region+0x1f9/0x2660 [ 31.783480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.783854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.784370] ? __pfx_lock_acquire+0x10/0x10 [ 31.784755] ? __pfx_mmap_region+0x10/0x10 [ 31.785145] ? security_mmap_addr+0x7d/0xa0 [ 31.785532] ? get_unmapped_area+0x1f5/0x3f0 [ 31.785945] do_mmap+0x854/0xf00 [ 31.786263] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.786626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.787041] ksys_mmap_pgoff+0x3af/0x500 [ 31.787418] do_syscall_64+0x3f/0x90 [ 31.787765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788237] RIP: 0033:0x7fd9f4dbfd82 [ 31.788572] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.790132] RSP: 002b:00007ffe762f8328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.790791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9f4dbfd82 [ 31.791406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9f41f9000 [ 31.792025] RBP: 00007fd9f41f9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.792646] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d65510ec0 [ 31.793260] R13: 00007ffe762f8340 R14: 00007ffe762f8370 R15: 00007ffe762f86d0 [ 31.793973] [ 31.794294] [ 31.794531] Allocated by task 212: [ 31.795005] kasan_save_stack+0x22/0x50 [ 31.795557] kasan_set_track+0x25/0x30 [ 31.796094] __kasan_slab_alloc+0x59/0x70 [ 31.796674] kmem_cache_alloc+0x16b/0x370 [ 31.797275] vm_area_dup+0x20/0x160 [ 31.797772] __split_vma+0x170/0x950 [ 31.798329] split_vma+0xc6/0x110 [ 31.798808] mprotect_fixup+0x8d2/0xb30 [ 31.799365] do_mprotect_pkey+0x87e/0xd40 [ 31.799942] __x64_sys_mprotect+0x78/0xc0 [ 31.800527] do_syscall_64+0x3f/0x90 [ 31.801055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.801778] [ 31.802037] Freed by task 212: [ 31.802468] kasan_save_stack+0x22/0x50 [ 31.803027] kasan_set_track+0x25/0x30 [ 31.803581] kasan_save_free_info+0x2b/0x50 [ 31.804172] __kasan_slab_free+0x10a/0x190 [ 31.804762] kmem_cache_free+0x10d/0x4d0 [ 31.805330] rcu_core+0x8c8/0x2860 [ 31.805825] __do_softirq+0x1b7/0x7d4 [ 31.806367] [ 31.806597] Last potentially related work creation: [ 31.807224] kasan_save_stack+0x22/0x50 [ 31.807773] __kasan_record_aux_stack+0x8e/0xa0 [ 31.808396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.809102] remove_vma+0x139/0x170 [ 31.809594] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.810224] do_vmi_munmap+0x1f1/0x2b0 [ 31.810751] __vm_munmap+0x138/0x3a0 [ 31.811258] __x64_sys_munmap+0x59/0x80 [ 31.811798] do_syscall_64+0x3f/0x90 [ 31.812312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.812998] [ 31.813228] The buggy address belongs to the object at ffff88800efff910 [ 31.813228] which belongs to the cache vm_area_struct of size 168 [ 31.814817] The buggy address is located 88 bytes inside of [ 31.814817] freed 168-byte region [ffff88800efff910, ffff88800efff9b8) [ 31.816331] [ 31.816567] The buggy address belongs to the physical page: [ 31.817276] page:0000000090e5e4d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefff [ 31.818448] memcg:ffff888018f6d601 [ 31.818917] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.819616] page_type: 0xffffffff() [ 31.820104] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.821091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f6d601 [ 31.822076] page dumped because: kasan: bad access detected [ 31.822792] [ 31.823024] Memory state around the buggy address: [ 31.823648] ffff88800efff800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.824580] ffff88800efff880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.825502] >ffff88800efff900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.826425] ^ [ 31.827263] ffff88800efff980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.828190] ffff88800efffa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.829113] ================================================================== [ 31.830339] Disabling lock debugging due to kernel taint [ 33.630215] BUG: Bad rss-counter state mm:00000000271fd337 type:MM_FILEPAGES val:33 [ 33.631118] BUG: Bad rss-counter state mm:00000000271fd337 type:MM_ANONPAGES val:22 [ 34.078516] BUG: Bad rss-counter state mm:000000000685712e type:MM_FILEPAGES val:33 [ 34.079691] BUG: Bad rss-counter state mm:000000000685712e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51002' (ECDSA) to the list of known hosts. 2023/06/21 02:35:04 fuzzer started 2023/06/21 02:35:04 dialing manager at localhost:36067 2023/06/21 02:35:04 checking machine... 2023/06/21 02:35:04 checking revisions... [ 34.778899] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:35:05 testing simple program... [ 34.825635] cgroup: Unknown subsys name 'net' [ 34.897873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016bff9e8 RCX=0000000000000001 RDX=1ffff11002d7ff48 RSI=ffff888016bffe28 RDI=ffffffff811fc524 RBP=ffff888016bffa40 RSP=ffff888016bff9c8 R8 =0000000000000001 R9 =ffff888016bffa28 R10=0000000000038001 R11=00000000000229a3 R12=ffff888016bffab0 R13=0000000000000000 R14=ffff88800f033680 R15=ffff888015f00680 RIP=ffffffff811fc8a2 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f69e5c11900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe190627ef0 CR3=000000001bddc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002c4ef54 RBX=0000000000039500 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8140eb04 RDI=0000000000000000 RBP=ffff888016277b88 RSP=ffff888016277a58 R8 =0000000000000000 R9 =ffffed10011fa111 R10=ffff888008fd088b R11=0000000000000000 R12=0000000000039500 R13=0000000000000001 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451cc5e RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8ef0d0f700 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd271db258 CR3=000000000edb0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2034303a35333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a35333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000